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Frequently Asked Questions

The Frequently Asked Questions (FAQs) are questions and answers about Compliance, Safety, Accountability (CSA) that the Federal Motor Carrier Safety Administration (FMCSA) compiled to assist the public. As questions come in through the website, FMCSA adds them to the database along with their answers. If you do not see your question or topic addressed, please contact us by submitting a feedback form. We will respond to you directly and consider your question for inclusion in the FAQs.

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  1. How do I change my MCS-150 data, such as Vehicle Miles Traveled (VMT) or Power Units (PUs)? Answer

    Although the Federal Motor Carrier Safety Administration (FMCSA) suggests that motor carriers update their MCS-150 every two years, motor carriers should understand that this is just the minimum requirement; motor carriers may update their MCS-150 form at any time. FMCSA encourages carriers to update their MCS-150 any time there is a change in their data. Since the Safety Measurement System (SMS) uses VMT and PU data, motor carriers should update their form at least once a year. Motor carriers can update their MCS-150 data by selecting: “I need to update my U.S. DOT Number registration information or file my biennial update” and following the instructions. For instructions on updating your MCS-150 form, visit the MCS-150 Instructions.

    The SMS updates monthly. MCS-150 changes will not appear immediately in the SMS, but likely will show up the following month. However, MCS-150 updates should show up more quickly on SAFER.

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